From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755330Ab2CaHrL (ORCPT ); Sat, 31 Mar 2012 03:47:11 -0400 Received: from terminus.zytor.com ([198.137.202.10]:54849 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752887Ab2CaHrI (ORCPT ); Sat, 31 Mar 2012 03:47:08 -0400 Date: Sat, 31 Mar 2012 00:46:41 -0700 From: tip-bot for Arnaldo Carvalho de Melo Message-ID: Cc: linux-kernel@vger.kernel.org, eranian@google.com, paulus@samba.org, acme@redhat.com, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, efault@gmx.de, davem@davemloft.net, dumitru.sorin87@gmail.com, fweisbec@gmail.com, dsahern@gmail.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, acme@redhat.com, paulus@samba.org, eranian@google.com, linux-kernel@vger.kernel.org, efault@gmx.de, peterz@infradead.org, davem@davemloft.net, dumitru.sorin87@gmail.com, fweisbec@gmail.com, dsahern@gmail.com, tglx@linutronix.de To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf annotate: Fix off by one symbol hist size allocation and hit accounting Git-Commit-ID: 64c17be4ffb8d6971051aec77ca1de4cfadb166d X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6 (terminus.zytor.com [127.0.0.1]); Sat, 31 Mar 2012 00:46:47 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 64c17be4ffb8d6971051aec77ca1de4cfadb166d Gitweb: http://git.kernel.org/tip/64c17be4ffb8d6971051aec77ca1de4cfadb166d Author: Arnaldo Carvalho de Melo AuthorDate: Wed, 28 Mar 2012 12:49:35 -0300 Committer: Arnaldo Carvalho de Melo CommitDate: Thu, 29 Mar 2012 17:13:45 -0300 perf annotate: Fix off by one symbol hist size allocation and hit accounting We were not noticing it because symbol__inc_addr_samples was erroneously dropping samples that hit the last byte in a function. Working on a fix for a problem reported by David Miller, Stephane Eranian and Sorin Dumitru, where addresses < sym->start were causing problems, I noticed this other problem. Cc: David Ahern Cc: David Miller Cc: Frederic Weisbecker Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Sorin Dumitru Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-pqjaq4cr1xs2xen73pjhbav4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/annotate.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index 31ba2a2..199f69e 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -28,8 +28,8 @@ int symbol__annotate_init(struct map *map __used, struct symbol *sym) int symbol__alloc_hist(struct symbol *sym) { struct annotation *notes = symbol__annotation(sym); - size_t sizeof_sym_hist = (sizeof(struct sym_hist) + - (sym->end - sym->start) * sizeof(u64)); + const size_t size = sym->end - sym->start + 1; + size_t sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64)); notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist); if (notes->src == NULL) @@ -64,7 +64,7 @@ int symbol__inc_addr_samples(struct symbol *sym, struct map *map, pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr)); - if (addr >= sym->end) + if (addr > sym->end) return 0; offset = addr - sym->start;